Senescence Metabolism

Senescence metabolism refers to the chemical processes that occur as cannabis plant tissues age and break down, particularly during late flowering and post-harvest curing. During this phase, chlorophyll degrades, proteins hydrolyze, and secondary metabolites accumulate or transform, creating distinct aromatic compounds. This natural maturation process involves enzymatic activity that converts chlorophyll into pheophytin and mobilizes stored nutrients, which can produce earthy, woody, and sometimes pungent or fermented notes. Breeders and cultivators often study senescence patterns to understand how harvest timing and curing conditions influence final aroma profiles. The compounds generated during senescence—such as volatile sulfur species, aldehydes, and ketones—are distinct from terpenes produced during active growth and can significantly shape the cured flower's character.

Breeders working with senescence-focused genetics select for cultivars that develop desirable aged aromas: earthy, tobacco-like, or complex fermented notes prized in certain markets. Understanding senescence metabolism helps growers and breeders optimize curing protocols and predict how a strain's aroma will evolve post-harvest.